Assessment of Marine Carbon Sink Resources and Potential in Zhejiang Province

Abstract

In the context of achieving the "double carbon" goal, the statistics of marine carbon sink resources and potential in Zhejiang Province is of great significance for Zhejiang Province to strive to build a "Zhejiang Model" of marine carbon sink trading and seize the strategic highland of national marine carbon sink trading. In this paper, the marine carbon sink of Zhejiang Province was divided into two parts: mariculture carbon sink and coastal wetland carbon sink. The current carbon sink capacity and future carbon sink growth potential were calculated respectively. The mariculture carbon sink used the data of mariculture shellfish and algae production in Zhejiang Province from 2010 to 2021. The shellfish and algae carbon reserves were calculated based on the Economic Value Accounting Method of Marine Carbon Sink. The coastal wetland carbon sink used the carbon density and wetland area product method to calculate the wetland carbon reserves. The results showed that at present, shellfish and algae culture carbon sink accounted for the main part of marine carbon sink in Zhejiang Province, while the scale of coastal wetland carbon sink was smaller. The growth of shellfish and algae culture carbon sink had been relatively stable in recent years, while the coastal wetland carbon sink had great potential for carbon sink growth. The carbon sink of shellfish and algae culture could increase the output and enhanced the carbon sink capacity by optimizing the business scale, and the carbon sink of coastal wetland could increase the carbon storage by increasing the planting area of mangrove.

Keywords

• marine carbon sink
• blue carbon
• mariculture
• shellfish and algae culture
• coastal wetland